Assume that $\sigma _ { 1 } ^ { 2 } = \sigma _ { 2 } ^ { 2 } = \sigma ^ { 2 }$. Calculate the pooled estimator of $\sigma ^ { 2 }$ for $s _ { 1 } ^ { 2 } = 50$, $s _ { 2 } ^ { 2 } = 57$, and $n _ { 1 } = n _ { 2 } = 18$.

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The Answer of Assume that $\sigma _ { 1 } ^ { 2 } = \sigma _ { 2 } ^ { 2 } = \sigma ^ { 2 }$. Calculate the pooled estimator of $\sigma ^ { 2 }$ for $s _ { 1 } ^ { 2 } = 50$, $s _ { 2 } ^ { 2 } = 57$, and $n _ { 1 } = n _ { 2 } = 18$.

Assume That σ12=σ22=σ2\sigma _ { 1 } ^ { 2 } = \sigma _ { 2 } ^ { 2 } = \sigma ^ { 2 }σ12​=σ22​=σ2

Assume That $\sigma _ { 1 } ^ { 2 } = \sigma _ { 2 } ^ { 2 } = \sigma ^ { 2 }$